You can find the CM-7004 Product sheet here.
You can find the CM-7004 Quick Start Guide here.
There is 1 storage device that we currently recommend for the CM-7004.
"Sandisk Extreme 500 series. Model# SDSSDEXT-120G "We have tested a number of Solid State storage devices. The Sandisk Extreme 500, 120GB (Must be formatted to FAT32) has consistently provided the best results.
*Enabling basic recording capability requires a USB drive (Flash or Solid State), minimum 16GB and maximum 128GB and be formatted to FAT32. IMPORTANT: The USB drive must be a new, first-time use device in order to be properly formatted for use with ConverterBox
Please note; The CM-7004 has been designed as a Digital signal to Analog signal converter. Primarily the CM7004 is used to accommodate older Analog TV's that do not have an HD ATSC tuner, or a Digital display that does not have an HD ATSC Tuner installed.
Secondary to that, it will also record TV programs. This is an economy set top box and has limited Recording options.